Function getPatternsByRoot

src/utils/permissions/filesystem.ts:919–953

(
  toolPermissionContext: ToolPermissionContext,
  toolType: 'edit' | 'read',
  behavior: 'allow' | 'deny' | 'ask',
)

}

function getPatternsByRoot(
  toolPermissionContext: ToolPermissionContext,
  toolType: 'edit' | 'read',
  behavior: 'allow' | 'deny' | 'ask',
): Map<string | null, Map<string, PermissionRule>> {
  const toolName = (() => {
    switch (toolType) {
      case 'edit':
        // Apply Edit tool rules to any tool editing files
        return FILE_EDIT_TOOL_NAME
      case 'read':
        // Apply Read tool rules to any tool reading files
        return FILE_READ_TOOL_NAME
    }
  })()

  const rules = getRuleByContentsForToolName(
    toolPermissionContext,
    toolName,
    behavior,
  )
  // Resolve rules relative to path based on source
  const patternsByRoot = new Map<string | null, Map<string, PermissionRule>>()
  for (const [pattern, rule] of rules.entries()) {
    const { relativePattern, root } = patternWithRoot(pattern, rule.source)
    let patternsForRoot = patternsByRoot.get(root)
    if (patternsForRoot === undefined) {
      patternsForRoot = new Map<string, PermissionRule>()
      patternsByRoot.set(root, patternsForRoot)
    }
    // Store the rule keyed by the root
    patternsForRoot.set(relativePattern, rule)
  }
  return patternsByRoot
}

export function matchingRuleForInput(
  path: string,